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REVENUE - Electric Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Electric Operations
Disaggregation of Revenue [Line Items]
Revenues	$ 93,235	$ 72,116	$ 239,154	$ 192,996
Delivered energy
Disaggregation of Revenue [Line Items]
Revenues	77,776	56,256	194,044	148,490
Delivered energy | Electric Operations
Disaggregation of Revenue [Line Items]
Revenues	77,776	56,256	194,044	148,490
Energy Capacity
Disaggregation of Revenue [Line Items]
Revenues	15,459	15,860	45,110	44,506
Energy Capacity | Electric Operations
Disaggregation of Revenue [Line Items]
Revenues	$ 15,459	$ 15,860	$ 45,110	$ 44,506

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